Improvement in planing machines



@uiten gisten getint @High IMPROVEMENT IN PLANING MACHINES.

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KNOW ALL MEN BY THESE PRESENTS:

That I, GILBERT J. RUGG, of tbe'city and county of Worcester, and Commonwealth of' Massachusetts, have invented certain -new and useful improvements in Wood-Working' Machines; andI do hereby declare that the following is a f nll, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in whichv Figure 1 represents a perspective view of so much of a machine for working wood as is necessary to illustrate my invention, a portion of the Vframe being broken away to show the parts more fully.

vFigure 2 represents'a longitudinal central section and Figure 3 represents a modification of the invention, as will be hereafter more fully explained. The nature of my invention consists in arnovel arrangement of weighting the feed-rolls in a planing machine. In the drawings A represents the frame, B the feed-roll frame, and C D the feed-rolls. The weights E can beslid back and forth on the lever F, and fastened at any desired point by the set-screws a. Lever F, on one side, is hinged at its front end to the lower end of rod b, which extends np,'and is fastened to the cross-piece G. The saine lever is also hinged to another rod, c, which `extends up and hooks around the box in which the journal of one end of the feed-roll D rests and turns. The lever F, on the other side ot` the machine, is arranged and connected in the same manner just described, so that the top-roll D is weighted by both weights E. The -upper boxes or bearings of the journals df the top-roll are connected with thc.crosspiece G by rods d, two at eachiend. It will now be seen that if the feed-roll'D is raised in a horizontal position, as it can be by the aid oi crank-screw levers H, that lever F will also be raised in -a horizontal position, or nearly so, as indicated in red lines, fig. 2. Guide piecese prevent levers F from swinging forward, while guidesfkeep them. from lateral play. The operation is as follows: The operator, by means of the crank screw, levers H, adjusts roll D at the desired distance above roll-C, and the work ofplaning commences,v roll D yielding bodily, or at either end` to the inequalities of the board.` This arrangementiis very simple, cheap, and yet very durable. It is such that the power of the weights E upon the boards is the same, whether set for thick or thinmaterial, since, as before explained, the lever israised bodily, when the upper roll is raised by the screw lever H, and yet when the board 'is running through, roll D can rise, and then fallback to itsproper position;.the rear ends of one or both 'of levers ybeing elevated, together with the weights E, through the action of roll D upon rod c. In g. ,3 is shown amodication of my inv'ention applied to weight a double set of rolls. I represents a slide-piece, in which the journals of rolls J 'J have theirbearings rods g g hook around or are connected to the journals or bearings of rolls J, while their lower ends are hinged to the connection piece K, as fully shown in the drawings. It will be seen that when slide-piece I is raised, lever F is raised in a. horizontal position, the same as .shown in g. 2, while veither-roll can rise to conform to the inequalitiesV of `the board. Slide-piece works up and down in proper guides in `the side o'f the frame.

Having described my improvements in machines for planing boards and for other purposes, what I claim as new and of my invention, and desire to secure by Letters Patent, is-` The combination of lever F with roll D, cross-piece G, and .rods 6 and @when constructed and operating substantially as shown and set forth.

GILBERT J. RUGG', Witnesses:

Tnosl. DODGE, D. L. MILLER. 

